<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    b 页面
    <!-- ../ 跳出一层父文件夹 -->
    <a href="../html_demo1.html"><img src="../img/OIP-C.jpg"></a>
</body>
</html>